Detachable telescopic sight mounting



33 245. (3R 2 505 319 5R EARCH ROOM April 25, 1950 F. c. BAKER AL 2,505,319

DETACHABLE TELESCOPIC SIGHT MOUNTING I Filed June 28, 1946 2 Sheets-Sheet l W W Wg IN V EN TORS' FEEDER/6X C. 8/] K 15' 1Q ARCH R0015 F. C. BAKER ET AL DETACHABLE TELESCOPIC SIGHT MOUNTING April 25, 1950 2 Sheets-Sheet 2 Filed June 28, 1946 4 TTO/Q/VE Y m m w m Patented Apr. 2 1950 UNITED STATES PATENT OFFICE DETACHABLE TELESCOPIC SIGHT UN TING Frederick C. Baker and E. Gary Spencer, Portland, Oreg.

3 Claims.

This invention relates to telescopic sights for guns or rifles, and, more specifically, to the mounting for such telescopic sight on the firearm.

In view of the fact that telescopic sights are more or less delicate and expensive it is desirable to remove such sight from the gun when the gun is not being used, in order that the telescopic sight can be kept in a suitable case and thus protected from inadvertent injury.

One of the difiiculties we have observed in connection with ordinary mountings for telescopic sights on guns is that considerable time and labor are required in removing the sight from the gun, with the result that the sight is very often not removed unless the gun is to be packed away for a prolonged period. While we are aware that some prior improvements have been made in sight mountings, to the best of our knowledge these still require considerable removal or loosening of screws and other adjustments every time the telescopic sight is removed from or replaced on the gun.

Another equally serious difliculty with removable mountings for telescopic sights is that when the telescopic sight is removed from the gun and subsequently placed back on the gun readjustment of the sight is then required to bring the aiming point of the telescopic sight back into the previous desired relative position with respect to the axis of the bore of the gun. The necessity for such readjustment will be apparent when the fact is considered that a difierence of one onethousandth of an inch variation in the positioning of the telescope, for example, could make a difference of several inches in the projected sight line on a distant target. With any loosening and tightening of ordinary screws such slight variation could hardly be avoided. Thus it has been necessary, even with readily demountable telescopic sights, to readjust the telescope after it has been replaced on the gun, and this generally requires considerable time and testing and firing of the gun.

An object of our present invention is to provide an accurate and reliable mounting for the telescopic sight which will enable the sight to be removed from the gun quickly and easily and just as quickly and easily set back in place on the gun whenever desired.

Another equally important object of our invention is to provide a detachable mounting for the telescopic sight which will insure the accurate returning of the sight to the same relative position of adjustment with respect to the axis of the gun bore as it was at the time of the re- 2 moval of the sight from the gun, so that readjustment and re-testing will not be necessary each time the sight is removed from, and subsequently replaced in position on, the gun.

A further object of our invention is to provide a mounting for this purpose which is simple and sturdy, relatively inexpensive to manufacture, and practical for ordinary use.

These objects and incidental advantages we attain by providing a sight mounting in which one part of the mounting is adapted to remain secured to the telescope, with the other part permanently secured to the gun stock, by providing simplified means for quickly and accurately attaching the first part to the second part, and, in general, by making the parts of our improved mounting as hereinafter briefly described with reference to the accompanying drawings. In the drawings:

Fig. 1 is a side elevation of the entire mounting with the parts in place, with portions broken away to show the interior construction and arrangement, and with the telescope and gun entirely omitted;

Fig. 2 is a similar side elevation of the same mounting, drawn to a smaller scale, showing also the gun and telescopic sight;

Fig. 3 is a view in perspective of that part of the mounting which is adapted to be secured to the telescope;

Fig. 4 is a similar perspective view of the other part of the mounting adapted to be permanently secured to the gun stock;

Fig. 5 is a vertical transverse section corresponding to line 5-5 of Fig. 3;

Fig. 6 is a top plan view of a slightly modified form of our mounting;

Fig. 7 is a side elevation of the same;

Fig. 8 is a similar elevation of the same mounting drawn to a smaller scale and showing the position of the mounting on the gun stock; and

Fig. 9 is a transverse section taken on line 99 of Fig. '7.

Referring first to Figs. 1 to 5 incl., the mounting shown in these figures comprises two main parts 20 and 2! (shown most clearly in Figs. 3 and 4 respectively). The part 20 is adapted to be secured to the telescope 22. The base part 2| is adapted to be permanently attached to the gun stock 23. The part 20 is formed with two clamping bands or rings 24 and 25, both of which connect with an integral horizontal top flange 25, through which screws 21 extend into the main body of the part thereby enabling the bands 24 and 25 to exert a clamping hold on the telescope when the telescope 22 is inserted in the bands, as shown in Fig. 2, and when the screws 21 have been tightened. When the telescope 22 is thus firmly clamped in the part 28 of the mounting in this manner the telescope will not ordinarily be removed from the clamping bands.

The body of the part 28 is also formed with an integral, vertical, longitudinally-extending mounting bracket 28, the shape of which is shown in Figs. 1 and 3. One end of the bracket 28 forms an extending vertical plate with V-. shaped, converging top and bottom edges 29. The opposite end terminates in an oblique surface 35. The reasons for thisparticular shaping of the ends of the bracket 28 Will be apparent later.

The part 2| of the mounting has an outer plane face and an inner face shaped in part to conform to the shape of the adjacent surface of the gun barrel 3|. Screws 32 secure this part firmly to the gun stock 23. The top of the part 2| is cut away, as shown in Fig. 4, leaving two upwardly extending end portions 33 and 34. The end portion 34 forms an oblique inside end wall 35 of the cut away section, the slope of this wall 35 being approximately the same as the oblique end surface 30 of the bracket 28 previously described.

The other end portion 33 has a cavity 36, shaped to accommodate the end portion of plate 28, with vertical side walls spaced a distance apart slightly greater than the thickness of the corresponding end of the plate 28, and having converging V-shaped top and bottom walls sloping in the same manner as the top and bottom V- shaped edges 29 of the plate 28.

A threaded bore 31 extends horizontally through the end portion 34, as shown in Figs. 1 and 4, and accommodates a thumb screw 38. The bracket 28 has a cylindrical recess 39 for accommodating the end of the screw 38. The tip end of the screw 38 is cone-shaped and the inner end of the recess 39 is correspondingly conical.

When the \part 28 of our mounting is to be set in place on part 2| the end of the bracket 28 with the converging edges is inserted in the cavity 36. The fact that both the opposite end 30 of the bracket 28 and the wall 35 slope obliquely enables the bracket 28 to be inserted in place very easily when the screw 38 is sufficiently withdrawn. Then the screw 38 is tightened.

Due to the fact that the tip of the screw 38 and the inner end of the screw recess 39 are cone shaped, and due to the fact that the converging edges 29 of the bracket 28 and the top and bottom walls of the recess 36 not only converge correspondingly but are also V-shaped in cross section, it will now be apparent from Fig. 1 that the tightening of the screw 38 will always insure exactly the same longitudinal alinement of the bracket 28 in the part 2| of the mounting. Thus the part 28, and with it the telescopic sight 22, can be removed from the part 2|, and thus removed from the gun, merely by loosening the single screw 38; and similarly the part 20, and with it the telescopic sight 22, can just as quickly and easily be set back in place on the gun and firmly and securely mounted without requiring any more than the tighten ing of the screw 38. But, since the bracket 28 will then be in exactly the same longitudinal alinement with respect to the permanently attached part 2| of the mounting as it was before the telescopic sight was removed the sight will have been returned exactly to its previously predetermined or adjusted position and the necessity for readjustment will be avoided. This is a very important feature of our invention.

In the modified form of our mounting shown in Figs. 6 to 9 inclusive, two separate clamping bands or rings I3 are employed on the telescope l5. These bands are clamped around the body of the telescope by means of the screws I4. A mounting plate It] is firmly secured to the gun stock by the screws I2.

Each clamping band 13 has a stem I6 (Fig. 9) adapted to fit in a recess l8.at the corresponding end of the mounting plate ill. The stems [6 are held in place in their recesses l8 by the screws ll. Each screw I! has a cone-shaped tip 19 and each stem I6 has a correspondingly coneshaped recess 20 to accommodate the end of the screw.

In using this modified form of our mounting the clamping bands [3 are first placed loosely on the telescope and are slid along the telescope until their stems [6 enter their respective recesses l8. Thereupon the stems H; are firmly held in the recesses by tightening the screws ll. Finally the telescope is secured, at the proper places in the clamping bands by tightening the screws l4.

When it is desired to remove the telescope from the gun all that is required is to loosen the thumb screws I! sufficiently to permit the telescope with the clamping bands to be lifted from the mounting plate I0. Ordinarily the clamping bands are not moved or loosened on the telescope and the plate In is not removed from or loosened on the gun stock.

When the telescopic sight is to be placed back on the gun for use all that is required is to insert the stems of the clamping bands into their recesses and tighten the screws l'I. Since the coneshaped tips of the screws [1 will always push into the conical recesses the tightening of the screws I! will insure the exact return of the clamping bands, and with them the telescopic sight, to the previous position with respect to the rigidly secured plate In and thus with respect to the gun bore. Consequently with this form of our mounting, the same as with the mounting shown in Figs. 1 to 5 inclusive, no readjustment of the telescopic sight is required each time the sight is removed and replaced.

Minor variations in the construction of the two forms of our mounting would be possible within the scope of our invention, but the particular forms which we have shown we believe to be preferable and most practical.

We claim:

1. In a telescopic sight mounting, a base adapted to be permanently attached to a gun and a telescope-holding part adapted to be detachably secured in said base, clamps on said telescopeholding part extending around the telescopic sight, a bracket on said telescope-holding part extending parallel to the longitudinal axis of the gun barrel, one end of said bracket formed with converging edges, the other end of said bracket having a screw-tip-receiving recess, a slot in said base for receiving the first mentioned end of said bracket, said slot having converging walls corresponding to said converging edges, and a screw in said base extending parallel to the longitudinal axis of the gun barrel and adapted to extend into said recess when said bracket is in place in said base and said screw is tightened, said screw SEARCH RGOiii having a cone-shaped tip, and the inner end of said recess being similarly cone-shaped.

2. In a telescopic sight mounting, a base adapted to be permanently attached to a gun and a telescope-holding part adapted to be detachably secured in said base, clamps on said telescope-holding part extending around the telescopic sight, a vertical bracket on said telescopeholding part extending parallel to the longitudinal axis of the gun barrel, one end of said bracket formed with converging top and bottom V-shaped edges, the other end of said bracket having a screw-tip-receiving recess, a slot in said base for receiving the first mentioned end of said bracket, said slot having converging walls corresponding to said converging edges, and a screw in said base extending parallel to the longitudinal axis of the gun barrel and adapted to extend into said recess when said bracket is in place in said base and said screw is tightened, said screw having a cone-shaped tip, and the inner end of said recess being similarly cone-shaped.

3. In a telescopic sight mounting, a base part adapted to be permanently attached to a gun and a telescope-holding part adapted to be detachably secured in said base, clamps included in said telescope-holding part extending around the telescopic sight, a bracket on said telescope-holding part extending substantially parallel to the iongitudinal axis of the gun barrel when said tele scope holding part is in place in said mounting, an integral extension at one end of said bracket, a recess provided in said base and located at one end of said base part conforming to the shape of said extension and adapted to receive said extension and to hold said extension against movement in any direction normal to the longitudinal axis of the gun barrel when said telescope-holding part is in place in said mounting, and cooperating securing means at the other end of said bracket and base part for locking said bracket in position in said base, said cooperating means including a screw mounted in one of said parts and extending parallel to the longitudinal axis of said gun barrel and a tapered recess in the other of said parts for engaging the tip of said screw when said screw is tightened, the tightening of said screw causing a thrusting force to be exerted on said bracket in the direction of said recess, whereby to keep said extension firmly thrust into said recess.

FREDERICK C. BAKER.

E. GARY SPENCER.

REFERENCES CITED The following references are of record in the tile of this patent:

UNITED STATES PATENTS Number Name Date 1,132,105 Mauser Mar. 16, 1915 1,428,655 Noske Sept. 12, 1922 2,119,925 Peterson June 7, 1938 2,396,404 Williams et a1 Mar. 12, 1946 2,401,825 Gruner June 11, 1946 FOREIGN PATENTS Number Country Date 11,896 Great Britain 1915 47,293 Switzerland 1907 

